i'm taking a rest this year from seed starting as i am doing some traveling about the time when my pepper seeds would start coming up but i would have grown all ultra hot peppers such as
bhut jolokias
7 pot
7 pot johna
naga morrich
jala banero which is cross between a jalapena and a habanero
also something called a horouga blend
trinidad scorion yellow
most likely i would have only tried to start maybe 3 or 4 of the above
last year i got one plant of my 7 pot and it produced over 200 peppers and hey were by far the hottest peppers i have ever grown.